TAPSO

TAPSO (CAS No.: 68399-81-5) is a zwitterionic biological buffer belonging to the class of Tris-based buffering agents, widely utilized in biochemical, molecular biology, and cell biology research for maintaining stable physiological pH conditions. It exhibits an effective buffering range near neutral to slightly alkaline conditions, typically between pH 7.0 and 8.2, with pKa values spanning approximately 7.5 to 9.0, making it particularly suitable for studies requiring tight pH control in this range. Structurally characterized by the presence of Tris functional groups, TAPSO demonstrates moderate chemical reactivity and can interact with zwitterionic biomolecules such as glycine-containing peptides, which may influence experimental outcomes in protein and peptide systems. Although it does not act on specific biological targets or signaling pathways in the manner of pharmacologically active compounds, TAPSO plays a critical mechanistic role in preserving the integrity of biochemical reactions, enzyme kinetics, and macromolecular stability by minimizing pH fluctuations. Its use is common in in vitro assays, including enzyme activity studies, protein purification workflows, and cell-based experimental systems, where buffer composition can affect biomolecular interactions and assay reproducibility. Typical working concentrations vary depending on the experimental design, often in the millimolar range, and should be optimized based on the specific requirements of the biological system under investigation.